There was a serious proposal to do something like this in the UK [1] the last time the government tried to introduce age checks for online porn. Age checks are

There was a serious proposal to do something like this in the UK [1] the last time the government tried to introduce age checks for online porn. Age checks are becoming mandatory this July but the idea of having a privacy-respecting option seems to have been dropped. [1]: https://www.independent.co.uk/news/uk/home-news/porn-passes-newsagents-shops-online-pornography-website-id-uk-government-a8349281.html?source=techstories.org https://www.independent.co.uk/news/uk/home-news/porn-passes-...